| Nominative | trep |
| Genitive | trepa |
| Dative | trepowi |
| Accusative | trep; trepa |
| Instrumental | trepem |
| Locative | trepie |
| Vocative | trepie |
| Nominative | trepy; trepowie |
| Genitive | trepów |
| Dative | trepom |
| Accusative | trepy; trepów |
| Instrumental | trepami |
| Locative | trepach |
| Vocative | trepy; trepowie |